President Donald Trump is set to unveil a new national security strategy on Monday, emphasizing national sovereignty over alliances, economic security, and reverse Obama-era warnings of climate change.

President Donald Trump is poised to outline a national security strategy that envisions nations in a perpetual state of competition and de-emphasizes the multinational agreements that have dominated the United States’ foreign policy since the Cold War.

Five Native American tribes that own an Oklahoma site where the U.S. Department of Homeland Security intends to conduct bioterrorism drills next year now oppose the government’s plan, saying the agency didn’t inform them it was releasing “potentially dangerous substances” on grounds where more than 100 children are buried.

Defense Secretary Jim Mattis is warning against dangerous flights by Russian fighter jets over what is considered a safe zone in Syria, questioning whether recent close calls were mistakes or deliberate.

America’s top diplomat stepped back Friday from his offer of unconditional talks with North Korea, telling world powers the nuclear-armed nation must earn the right to negotiate with the United States.

Secretary of State Rex Tillerson has softened America’s stance on possible talks with North Korea, calling it “unrealistic” to expect the nuclear-armed country to come to the table ready to give up a weapons of mass destruction program that it invested so much in developing.